package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;


@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 新增菜品和对应的口味
     *
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入1条数据
        dishMapper.insert(dish);//后绪步骤实现


        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();


        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dish.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);//后绪步骤实现
        }
    }

    /**
     * 菜品分页查询
     * @param dto
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(),dto.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dto);
        return new PageResult(page.getTotal(),page.getResult());
    }
    @Transactional
    public void deleteBatch(List<Long> ids){
        //不能删除：存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){ //状态为1起售中
                //当前菜品处于起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //不能删除：菜品被套餐关联
        List<Long> setmealIds = setmealMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size()>0){
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品数据

        dishMapper.deleteById(ids);
        //删除口味数据
        dishFlavorMapper.deleteByDishId(ids);


    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */

    @Override
    public DishVO getById(Long id) {
        Dish dish =dishMapper.getById(id);
        List<DishFlavor> dishFlavors =dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        //删除原来的口味数据：
        dishFlavorMapper.deleteByDishId(Arrays.asList(dish.getId()));
        //重新插入数据


        if(dishDTO.getFlavors().size()>0 && dishDTO.getFlavors()!=null){
            List<DishFlavor> flavors = dishDTO.getFlavors();

            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }


    }

    /**
     * 启用禁用菜品状态
     * @param status
     * @param id
     */
    @Override
    public void updateStatus(Integer status, Long id) {

        Dish dish = Dish.builder().status(status).id(id).build();
        dishMapper.update(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /**
     * 获取分类id
     * @param id
     * @return
     */
    @Override
    public Long getCategoryId(Long id) {
       Long ans =  dishMapper.getCategoryId(id);
       log.info("当前修改or删除的商品的分类id为：{}",ans);
       return ans;
    }
    //根据分类id查询菜品
    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        //封装好一个Dish对象
        Dish dish=new Dish();
        dish.setCategoryId(categoryId);//根据categoryId查询菜品
        dish.setStatus(StatusConstant.ENABLE);//只查询status=1的菜品

        List<Dish> list=dishMapper.list(dish);
        return list;
    }


}
